'''
17-LESSON
'''
X = 10
print(X, id(X))
X = 20
print(X, id(X))

S = 'hello'
print(S, id(S))
S += ' world'
print(S, id(S))

l = [1, 2, 3]
print(l, id(l))
l.append(5)
print(l, id(l))

X = 10
Y = X

print(X, id(X))
print(Y, id(Y))

X = 15
print(X, id(X))
print(Y, id(Y))

l1 = [1, 2, 3]
l2 = l1
l2 = l1.copy()
l2 = l1[:]

print(l1, id(l1))
print(l2, id(l2))

l1.append((5))
print(l1, id(l1))
print(l2, id(l2))

X = 10
print(X)
del X

G = 15
G2 = G
print(G, id(G))
print(G2, id(G2))
